Wrapping machine



June 8 1926.

F. K. ARNOLD WRAPPING MACHINE Filed June 10, 1924 Patented June 8, 1926.

UNITED STATES FRANK K. ARNOLD, OF KEENE, NEW HAMPSHIRE.

WRAPPING MACHINE.

Application filed June 10, 1924. Serial No. 719,194.

My invention relates to improvements in wrapping machines.

The object of my invention is to provide improvement upon my Patent No.1,412,? 54 whereby the plunger for feeding the article to be wrappedsuch as bread or the like is moved slowly upwardly and very even- 1y sothat the folders can operate more effectively upon the wrapper.

Another object of my invention is to provide means for moving thepackage supporting plunger upwardly in a vertical line ata slow evenspeed and to cause a quick return of the plunger whereby production ismaterially increased without effecting the operativeness of the folders.

A further object of my invention is to provide a simple, cheap andeffective means for feeding the articles to the wrapping machine andhaving certain details of structure and combination of parts hereinaftermore fully set forth.

In the accompanying drawings Figure 1 is a side elevation of my improvedplunger for feeding the articles separately to the folders, the foldersbeing shown in dotted lines and of a structure shown in my patentherebefore mentioned.

Figure 2 is an enlarged front view of the plunger showing the means forimparting a slow upward movement thereof and .a quick return.

Figure 3 is a side view of Figure 2.

Referring now to the drawings 1 repre sents the base which as shown isprovided with a vertically disposed standard 2 in which are mounted thetwo sprocket wheel shafts 3 and 4. The shaft 4 of the sprocket Wheels 5extends through the standard 2 and is provided with a pulley 6 overwhich passes a belt 7 driven and timed with the folding mechanism andwhereby the sprocket wheel 5 is continuously rotated. While I have shownand described the lower sprocket as being driven the upper sprocketcould be driven by a pulley. The shaft of the upper sprocket wheel 3 ismounted in an eccentric bearing 8 which is held in an adjusted positionby means of the set screw 9 and whereby the distance between the twosprocket wheels may be varied for the purpose of tightening the chain.

Passing around the two sprocket wheels 5 is .a chain 10 which has aspecially constructed link 11 having a wrist pin 12 upon which ismounted the pitman 13. The upper end of the pitman is mounted upon thewrist pin 14 carried by the rod 15 which carries at its upper endtheplunger 16. The rod 15 may be supported by guides 17 carried by anypart of the machine so that the rod 15 and the plunger 16 movesvertically. The rod 15 is positioned at one side of the center of thesprocket wheels 5 so that the rod is moving upwardly as indicated by thearrow Figure 2, when the chain is traveling in the direction of thearrow Figure 2. By

this structure it will be seen that the plunger commences to moveupwardly slowly from the time the wrist pin 12 has passed a verticalline with the shaft 4 and moves slowly until the wrist pin again reachesa point opposite the upper sprocket below the rod 15. The first and lastportion of this movement is slower than the intermediate portion of themovement. After the wrist pin 12 has reached a point below the rod 15 ittravels rapidly downwardly from the points 18 to the point 19.

Arranged opposite the plunger 16 when at its lowest position isahorizontal belt 20 carrying fingers 21 which convey the articles to bewrapped and deposit them upon the plunger. This belt 20 is so timed thatwhen the plunger reaches its downward movement upon each stroke anarticle is fed to the plunger. Arranged above the plunger is a roll ofpaper 22 which extends across the path of travel of the plunger and isprovided with a cutter 23 which serves the proper amount of paper fromthe roll and leaves it draped over the articles on the plunger as itmoves upwardly. The continued upward movement of the plunger forces thearticle with the paper wrapper draped thereon between the folders 24which folds the paper around the bottom of the article and around theends all of which is fully shown and described in my patent herebeforereferred to.

By the above description it will be seen that the continuous rotation ofthe sprocket chain causes the plunger to reciprocate up and down veryevenly and upon its upward movement it travels slowly at the last partof its movement so that the folders and tuckers will have a chance tofold and tuck the wrapper around the bottom and ends of the articlebeing wrapped. After this operation the wrist pin has reached the point18 when it commences to travel down rapidly and thus cause a quickreturn of the plunger until the wrist pin has reached the point 19. Theplunger practically stands still until the link carrying the wrist pinpasses around the lowermost portion of the sprocket wheel 5 when theplunger is again started upwardly. true I have provided means forfeeding the articles to be wrapped to the tuckers and wrappers so thatthey are more effectively wrapped and yet more slowly feeding thearticles and at the same time allowing for a rapid return of the plungerwhich allows the machine to wrap a greater amount of articles moreeffectively in a predetermined length of time.

Having thus fully described my invention what I claim is:

1. A wrapping machine con'iprising folders adapted to act on thewrappers, a plunger feeding packages to the folders and means forcausing a slow movement of the plunger just prior to reaching the folderand a quick return thereof.

2. A wrapping machine con'rprising folders adapted to act on thewrappers. a plunger feeding packages to the folders, and a chain formoving the plunger slowly just before the same reaches the folders andcausing a quick return thereof.

3. A Wrapping machine comprising foldcrs adapted to act on the wrappers,a plungor feeding the packages to the folders, a chain below the plungerand having a pitman connection therewith and adapted to cause a slowmovement of the plunger just prior to reaching the folders and to causea quick return of the plunger.

4. A wrapping machine comprising fold- By this struc- I crs adapted toact on the Wrappers, a plunger feeding packages to the folders, and anendless chain arranged at one side of the plunger, and a pitmanconnecting the plungcr to the chain whereby the plunger moves slowlyjust prior to reaching the folders, and has a rapid return.

5. A wrapping machine comprising folders adapted to act on the wrappers,a wrapper feeding and cutting mechanism below the folders. a plungerbelow the -rapper feeding mechanism, and means for causing the slowmovement of the plunger just prior to reaching the folders and causing aquick return of the plunger.

6. A wrapping machine comprising folders adapted to act on the Wrappers,a wrapier feeding and cutting mechanisnl )elow the folders, a plungerbelow the wrapper mcchanisn'i, and means for moving said plungerupwardly toward the folders under the wrappers and to decelerate themovement of the plunger just prior to reaching said plunger and toaccelerate the return movement of the plunger.

7. A wrapping machine con'iprisiug folders adapted to act on thewrappers, a wrap per feeding and cutting mechanism below the folders,mechanism, an endless chain arranged at one side of the plunger, and apitman connecting the plunger to the chain whereby the movement of theplunger is decelerated just prior to reaching the folders andaccelerated on its return movement.

In testimony whereof, I afliX my signature.

FRANK K. ARNOLD.

a plunger below the wrapper

